FD2004 Datasheet, PDF (1/2 Pages) Fairchild Semiconductor – Adaptive Digital DC-DC Controller with Current Sharing

September 2008
FD2004 — Adaptive Digital DC-DC Controller with
Current Sharing
1. Overview
1.1. Features
Power Conversion
ƒ Efficient Synchronous Buck Controller
ƒ Adaptive Performance Optimization Algorithms
ƒ 4.5V to 14V Input Range
ƒ 0.54V to 4V Output Range (with Margin)
ƒ ± 1% VOUT Setpoint Accuracy
ƒ Fast Load Transient Response
ƒ Current Sharing and Phase Interleaving
ƒ Digitally Adjustable Current Sense Range
ƒ Snapshot™ Parametric Capture Mechanism
ƒ RoHS-Compliant (5 x 5mm) QFN Package
Power Management
ƒ Digital Soft-Start/Stop
ƒ Precision Delay and Ramp-up
ƒ Power Good / Enable
ƒ Voltage Tracking, Sequencing, and Margining
ƒ Voltage / Current / Temperature Monitoring
ƒ SMBus Communication (PMBus™ Compliant)
ƒ Output Voltage and Current Protection
ƒ Internal Non-volatile Memory (NVM)
1.2. Applications
ƒ Servers / Storage Equipment
ƒ Telecom / Datacom Equipment
ƒ Power Supplies (Memory, DSP, ASIC, FPGA)
IMPORTANT NOTE:
ƒ For additional information, please contact
[e-mail].
1.3. Description
The FD2004 is a digital DC-DC controller designed to
work with the FD1505 MOSFET driver IC. Current
sharing allows multiple devices to be connected in
parallel to source loads with very high current demands.
Adaptive performance optimization algorithms improve
power conversion efficiency across the load range. The
Digital-DC™ technology enables a blend of power
conversion performance and power management features.
The FD2004 is designed to be a flexible building block
for DC power and can be easily adapted to designs
ranging from a single-phase power supply operating
from a 4.5V input to a multi-phase supply operating
from a 12V input. The FD2004 eliminates the need for
complicated power supply managers as well as
numerous external discrete components.
Operating features can be configured by pin-strap /
resistor selection or through the SMBus serial interface.
The SMBus is also used for communication with a host
controller. For inter-device communication with other
Digital-DC devices, the single-wire DDC bus is used.
Figure 1. Block Diagram
© 2008 Fairchild Semiconductor Corporation
FD2004 • Rev. 1.3.1
www.fairchildsemi.com